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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7393468 | Adhesive with differential optical properties and its application for substrate processing An adhesive adapted with particular optical properties, and its use to couple a substrate to a substrate holder during substrate processing are disclosed. After processing the substrate, the optical properties of the adhesive may be exploited to locate and/or remove... | 07/01/2008 |
| 7132174 | Copolymers having tunable energy levels and color of emission Different formulations of copolymers can be used to adjust or “tune” the energy levels (HOMO and LUMO) and the color of light emitted by an organic electronic device. The copolymer may principally include of electron-rich and electron-deficient monomeric units w... | 11/07/2006 |
| 6525200 | Multicyclic aromatic compounds and uses thereof Multicyclic aromatic compounds useful as complexing agents having the general formula: ##STR1## Methods of complexing and quantitating a component in a sample such as urea or guanidine are also disclosed.... | 02/25/2003 |
| 6391065 | UV light absorber composition and method of improving the lightfastness of dyed textiles A water-dilutable UV light absorber composition and method for improving the lightfastness of dyed textiles is provided. The composition includes from about 5-75% by weight of an ultraviolet light absorbing agent selected from the group consisting of benz... | 05/21/2002 |
| 6274065 | Process for the preparation of fluorescent compositions, fluorescent compositions and their use Preparation of a solid fluorescent composition comprising (1) mixing a host chromophore and an effective amount of a pigment precursor in a solvent, then generating a pigment as guest chromophore in-situ from the pigment precursor, and, subsequently, isolating... | 08/14/2001 |
| 6120704 | Mixtures of optical brighteners The invention relates to mixtures of optical brighteners comprising nonionic polyester brighteners and anionic or nonionic polyamide brighteners, which develop a synergistic effect. The brighteners of the invention are suitable for polyamide and polyureth... | 09/19/2000 |
| 6117189 | Protective method The present invention relates to a method for the improvement of the sun protection factor (SPF) of textile fiber material, comprising applying to the textile fiber material a detergent comprising at least one fluorescent whitening agent, which absorbs ra... | 09/12/2000 |
| 5755999 | Blue luminescent materials for organic electroluminescent devices A luminescent material including a compound of the formula: ##STR1## where: n is an integer of 2 or 3; M is a divalent metal or a trivalent metal; G is a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, both the ... | 05/26/1998 |
| 5695687 | Anhydrous fluorescent whitening agent formulation The present invention provides an anhydrous fluorescent whitening agent formulation comprising: a) 5 to 60, preferably 15 to 45% by weight of a fluorescent whitening agent or a mixture thereof; b) 0 to 10, preferably 0 to 2% by weight of a stabiliser or a mixt... | 12/09/1997 |
| 5512620 | Benzoxazolyl optical brightners in and for thermoplastic compositions Benzoxazolyl brightner compounds and thermoplastic combinations containing such are provided herein. The thermoplastic compositions comprise a thermoplastic resin, a phosphite heat stabilizer present in reduced levels, a brightner present in reduced level... | 04/30/1996 |
| 5395748 | Ballasted optical brighteners An inexpensive, ballasted optical brightener for use in photographic elements is prepared by reacting an optical brightener of the formula ##STR1## where M is a cation; X is a group capable of undergoing nucleophilic displacement; and Z is ##STR... | 03/07/1995 |
| 5298190 | Photochromic fluorescent compositions A composition containing a photochromic material and a fluorescent pigment provides a duality of color in products where the composition is used as the coloring agent. Under ordinary lighting conditions, the composition will provide a brilliant, glowing c... | 03/29/1994 |
| 5152922 | 1,4-distyrylbenzene compounds and mixtures thereof with other 1,4-distyrybenzene compounds Novel 1,4-distyrylbenzene compounds of the formula ##STR1## and mixtures thereof with compounds of the formulae ##STR2## and/or ##STR3## in which R1 is C1 -C4 -alkyl or phenyl, R2 is cyano, C... | 10/06/1992 |
| 4888128 | Paper-coating slips containing fluorescent brighteners Fluorescent brightener salts of the formula ##STR1## in which A denotes the anion of an anionic cellulose fluorescent brightener, R1 denotes alkyl, alkenyl, aralkyl, aryl or cycloalkyl, R2, R3 and R4 denote hydr... | 12/19/1989 |
| 4466900 | Process for the preparation of fluorescent brightener formulations which are stable on storage A process is described for the preparation of concentrated liquid formulations, stable on storage, of anionic fluorescent brighteners, which process consists in passing a crude (for example obtained from synthesis) aqueous solution or dispersion of a fluo... | 08/21/1984 |
| 4462925 | Stable solutions of optical brighteners A stable aqueous solution comprising (a) 5-25% by weight of an optical brightening agent of formula I ##STR1## in which R1 to R9, X and A.crclbar. are defined in the specification (b) 5-70% by weight of an organic monobas... | 07/31/1984 |
| 4460374 | Stable composition for treating textile substrates The invention relates to a stable composition for treating textile substrates which contains at least (a) an organic solvent which is sparingly soluble to insoluble in water and in which component (b) is dissolved and component (c) is dissolved or dispers... | 07/17/1984 |
| 4442017 | Additive blends for polymeric materials Additives, such as stabilizers, antioxidants, antistatic agents etc., are intimately blended with an irradiation-responsive substance, such as an optical brightener, and incorporated in a thermoplastic polymeric material which is then subjected to irradia... | 04/10/1984 |
| 4400294 | Mixtures of optical brighteners Mixtures of optical brighteners consisting of (a) 1 to 99 weight % of one or several compounds of the formula 1 ##STR1## (b) 99 to 1 weight % of one or several compounds of the formula 2 ##STR2## wherein n is 0 or 1, X is oxygen or sulfur, B is a gro... | 08/23/1983 |
| 4379934 | Process for two-dimensionally concentrating light, and novel perylene-3,4,9,10-tetracarboxylic acid diimides A process for concentrating light by means of fluorescent compounds of the formula ##STR1## where the R1 's independently of one another are ortho-substituted aromatic or heterocyclic radicals which do not contain groups which confer ... | 04/12/1983 |
| 4363744 | Mixtures of optical brighteners and their use for the optical brightening Mixtures of optical brighteners consisting of from (a) 0.98 to 0.50 part by weight of a mixture consisting of from 0.05 to 0.95 part by weight of a brightener of the series of the benzoxazolyl-stilbenes and of from 0.95 to 0.05 part by weight of a brighte... | 12/14/1982 |
| 4336155 | Mixtures of optical brighteners Mixtures of optical brighteners consisting of 5 to 95% by weight of a compound of the formula ##STR1## in which A denotes a o- or p-cyanophenyl group, and 95 to 5% by weight of one or more further optical brighteners.... | 06/22/1982 |
| 4331805 | V-Triazolyl-[4,5-d]-pyrimidines New v-Triazolyl-[4,5-d]-pyrimidines of the formula ##STR1## wherein Q and Q1 independently of one another are a secondary or tertiary amino radicals and X, X1 and X2 are certain nonchromophoric substituents, their pre... | 05/25/1982 |
| 4330427 | Mixtures of optical brighteners Mixtures of optical brighteners consisting of 5 to 95 parts by weight of a mixture consisting of 0 to 80% by weight of the compound of the formula 1 ##STR1## 20 to 100% by weight of the compound of the formula 2 ##STR2## and 0 to 80% by weight o... | 05/18/1982 |
| 4311605 | Compositions for treating textiles The invention provides compositions for improving the appearance of used textiles which contains a photoactivator and a fluorescent whitening agent which is a distyrylbiphenylsulfonic acid or a salt thereof and/or a 4,4'-bis-(1,2,3-triazol-2-yl)-2,2'-stil... | 01/19/1982 |
| 4302586 | V-Triazolyl-[4,5-d]-pyrimidines v-Triazolyl-[4,5-d]-pyrimidines of the formula ##STR1## wherein Q is a mono- or disubstituted amino radical, R is an optionally substituted alkyl or aryl group and the benzene ring A can carry one or two substituents. The compounds are suitable as fl... | 11/24/1981 |
| 4263431 | Cationic fluorescent whitening agents The invention relates to cationic fluorescent whitening agents of the formula ##STR1## wherein A is the radical of a fluorescent whitening agent, Q is the direct bond or a bridge member, R1 to R5 are specific substituents and ... | 04/21/1981 |
| 4235741 | v-Triazoles Novel 2,4-Bis-(stilben-4'-yl)-v-triazoles of the formula ##STR1## wherein the rings A, B, C, D and E can contain certain nonchromophoric substituents, methods for their preparation as well as their use as optical brighteners are disclosed.... | 11/25/1980 |
| 4236003 | V-Triazolyl-[4,5-d]-pyrimidH. New v-Triazolyl-[4,5-d]-pyrimidines of the formula ##STR1## wherein Q and Q1 independently of one another are a secondary or tertiary amino radicals and X, X1 and X2 are certain non-chromophoric substituents, their pr... | 11/25/1980 |
| 4189589 | Phenyl-benzimidazolyl-furanes 2-Phenyl-5-benzimidazol-2'-yl-furanes of the formula ##STR1## in which R1 is a sulphonic acid group or an ester or amide thereof, a carboxylic acid group or an ester or amide thereof, a cyano group, a trifluoromethyl group or an alkyl- or ... | 02/19/1980 |
| 4184977 | Fluorescent dyestuffs Fluorescent dyestuffs of the formula ##STR1## wherein X and Y denote hydrogen, halogen, alkyl, aralkyl, alkenyl, hydroxyl, amino, alkoxy, aralkoxy, cycloalkoxy, aryloxy, alkylmercapto, alkylamino, dialkylamino, morpholino, piperidino, piperazino, pyr... | 01/22/1980 |
| 4157443 | V-Triazolyl-[4,5-d]-pyrimidines New v-Triazolyl-[4,5-d]-pyrimidines of the formula ##STR1## wherein Q and Q1 independently of one another are a secondary or tertiary amino radicals and X, X1 and X2 are certain non-chromophoric substituents, their pr... | 06/05/1979 |
| 4146725 | Benzofuranyl-benzimidazoles Disclosed are novel benzofuranyl benzimidazoles and a method for their preparation. The novel benzofuranyl benzimidazoles are useful as optical brighteners for optically brightening a wide variety of synthetic, regenerated or natural organic materials or ... | 03/27/1979 |
| 4141900 | 3-Phenyl-7-(v-triazol-2-yl)-coumarins Novel 3-phenyl-7-(v-triazol-2-yl)-coumarins of the formula ##STR1## wherein R represents hydrogen, unsubstituted or substituted alkyl, alkenyl, alkanyol, aroyl, aralkyl, alkoxycarbonyl, carbamoyl or v-epoxyalkyl, the rings A, B and C being optionally... | 02/27/1979 |
| 4126412 | Method for stabilizing brightened modacrylic fibers The method of preventing color-degrading interactions between certain optical brighteners and filaments made from a modacrylic polymer containing as a copolymer a halogenated ethylenically unsaturated monomer, the optical brightener preferably having the ... | 11/21/1978 |
| 4075211 | Naphthalimide compounds and optical brighteners Compounds of the naphthalimide series which in the dissolved condition exhibit a characteristic blue, violet or bluish violet fluorescence, and a process for their production. The compounds are outstandingly suitable for the optical brightening of synthet... | 02/21/1978 |
| 4018789 | 5-Substituted-2-(2')-benzimidazoyl-furans Disclosed are optical brightening agents, such agents being 2-(2')-benzimidazoyl-furans substituted in the 5-position of the furan ring by a 1-aryl-pyrazolyl-3, -4 or -5 radical, by a pyrazolyl-1 radical or by a 2-aryl-v-triazolyl-4 radical, such compound... | 04/19/1977 |
| 3983117 | 6-Triazinylaminobenzofurans 6-N-triazinylaminobenzofurans and their production. The compounds are suitable for the optical brightening of natural and synthetic fibers and also of plastics materials, particularly of polyamides, cellulose esters, polyesters and acrylonitrile polymers.... | 09/28/1976 |
| 3959277 | Diimidazopyrazines and tetracarboxamidopyrazines Diimidazopyrazines of the formula: ##SPC1## Wherein R1 and R2 are selected from the group consisting of lower alkyl and aryl of 6 to 12 carbons which may be optionally substituted are described. These compounds are useful as brighten... | 05/25/1976 |
| 3939158 | N-(2,4-dihalo-S-triazin-6-yl)-ureas and process for their manufacture A process for the manufacture of N-(2,4-dihalo-s-triazin-6-yl)-ureas of the formula ##SPC1## Wherein X represents halogen, R represents alkyl, aryl or hydrogen and Y represents hydrogen or the sulphonic acid group, which comprises reacting a dihalo-a... | 02/17/1976 |
